Sony HDW-F900 Operation Manual page 19

3 BREAKER button
If excessive current flows within the unit, the breaker is tripped
automatically to shut off the power supply and protect the equipment.
2
After performing internal checks or adjustments, use a pointed object
such as a pen to press down lightly on this button. If there is no problem,
the power will again be supplied.
4 POWER switch
This switch turns the main power supply on and off.
2-2
Chapter 2 Locations and Functions of Parts and Controls